Low profile and a low price, check out Fractal Design's Node 304

Fractal Design's Node 304 SFF case is 250 x 210 x 374 mm (9.8" x 8.2" x 14.7") and thanks to the removable HDDs you can actually fit larger sized GPUs in the case, though the biggest will be blocked by the PSU. Cooling comes from a pair of front mounted 92mm fans and a 140mm in the rear, all attached to a fan controller to help you manage the noise levels. HiTech Legion puts the MSRP of this case at $89 which is very impressive for a SFF case with this many features, especially the six HDD bays, but wish that the case was properly compatible with Micro-ITX PSUs to give even more space for a high end GPU.

"The Fractal Design Node 304 computer case brings style and functionality to the small computing market. The Node 304 features a modular design that allows easy configurability. Motherboard support includes mini-ITX and DTX compatibility. There are two expansion slots available. A total of six drives, either 2.5” or 3.5” can be installed. There is room for a full ATX PSU, up to 160mm in length. CPU coolers can be installed up to 165mm in height and GPUs up to 310mm in length (with adaptation). Fractal has included a cooling system with two front mounted 92mm Silent Series R2 hydraulic bearing fans and one rear 140mm Silent Series R2 hydraulic bearing fan. There is also a fan controller included with low, medium, and high settings. The front interface includes two USB 3.0 ports, a 3.5mm mic, and 3.5mm headphone connection."